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Karolina [17]
3 years ago
15

How to solve 8x^3+1=0

Mathematics
1 answer:
dem82 [27]3 years ago
6 0
8x^3 + 1 = 0   
8x^3 = -1      <----------- Step 1: Subtract 1 from both sides.
x^3 = -1/8     <----------- Step 2: Divide both sides by 8.
x = ∛(-1/8)    <----------- Step 3: Cube root both sides
x = -0.5         <----------- This is the final answer when you plug the last step into                                            the calculator
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Step-by-step explanation:

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\bar X = \frac{\sum_{i=1}^n X_i}{n}

And we want a normal distribution for the sample mean

\bar X \sim N(\mu , \frac{\sigma}{\sqrt{n}})

In order to satisfy this distribution we need that each observation on this case comes from a normal distribution, because since the sample size is not large enough we can't apply the central limit theorem.

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